黑龙江省老莱河流域河漫滩沉积泥沙来源研究  

Study on the sources of floodplain sediment in Laolai River Basin of Heilongjiang Province

作　　者：刘冰[1] 王友胜[1] 张磊[1] 解刚[1] LIU Bing;WANG You-sheng;ZHANG Lei;XIE Gang(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038

出　　处：《泥沙研究》2022年第6期59-65,共7页Journal of Sediment Research

基　　金：国家重点研发计划项目(2019YFC1510701、2018YFC0407304);流域水循环模拟与调控国家重点实验室自主研究课题(SKL2022TS10,SKL2020TS10)。

摘　　要：泥沙来源的判别对揭示流域土壤侵蚀规律和开展土壤侵蚀防治具有重要意义。选取松花江三级支流的老莱河流域为研究区,采集河漫滩沉积泥沙剖面样品,通过指纹识别法计算了沉积泥沙来源的贡献率。研究结果表明:平均37.86%的泥沙来自耕地,31.41%来源于非耕地,30.74%来源于侵蚀沟。黏粒和粉粒含量与侵蚀沟的贡献率影响呈正相关,与非耕地呈负相关,与耕地的贡献率无统计相关性。研究结果与小流域研究结果存在一定差异,特别是非耕地贡献率相对较高。主要原因为非耕地草地土壤侵蚀严重;指纹识别因子受采样区土地利用影响较大;泥沙来源组间差异较差。Identification of sediment sources is important for study on soil erosion.The Laolai River Basin,a third-level tributary of the Songhua River in the black soil area of northeast China,was selected as the study area.The results show that on average,37.86%(26.81%~55.78%)of the sediment transport from cultivated land,31.41%(16.47%~43.09%)came from uncultivated area,and 30.74%(18.93%~43.19%)came from gullies.The content of clay and silt particles is positively correlated with the contribution rate of gullies,negatively correlated with uncultivated area,and has no statistical correlation with the contribution rate of cultivated land.There are certain differences between the research results and the research results of small watersheds,especially the uncultivated area contribution rate is relatively high.The main reasons are soil loss from grassland is greater than cultivated land;the fingerprinting factors are greatly affected by the land use;group differences were small among sediment sources.

关 键 词：指纹识别方法 泥沙来源 河漫滩沉积 

分 类 号：TV141.3[水利工程—水力学及河流动力学]